A trading platform is the software that enables investors and traders to place trades and monitor accounts through financial intermediaries. Oftentimes, trading platforms will come bundled with other features, such as real-time quotes, charting tools, news feeds, and even premium research. Platforms may also be specifically tailored to specific markets, such as stocks, currencies, options, or futures markets.
What are your financial goals for 10, 15, or 20 or more years down the line, and how do you plan on getting there? What is your level of risk tolerance, and what sort of investment approach will you take (value investing, dividend investing, or some combination of multiple strategies)? As you consciously outline your financial goals and the type of investor you want to be, you can experience success as a disciplined investor in the long run and stay on track with your plans.
A broker is simply a licensed person through whom you can buy and sell these stocks. When you use an online platform, it essentially acts as an online broker. If someone wants to buy any product, he can contact a brokerage service. They would place an order and let him know the market price of the product. If the investor is interested, they would include a commission for themselves and process the order forward. If the user wishes to buy stock, the broker would forward his order to a stock exchange, which would approximately take 3 days to complete including the money exchange between the broker and the investor.